:root {
    --background-color: #2c3e50;
    --border-color: #7591AD;
    --text-color: #34495e;
    --color1: #EC3E27;
    --color2: #fd79a8;
    --color3: #0984e3;
    --color4: #00b894;
    --color5: #fdcb6e;
    --color6: #e056fd;
    --color7: #F97F51;
    --color8: #BDC581;
}

* {
    margin: 0;
    padding: 0;
}

html {
    font-size: 14px;
}

body {
    width: 100vw;
    height: 100vh;
    background-color: var(--background-color);
    display: flex;
    justify-content: center;
    align-items: center;
    /* 视距1000px */
    perspective: 1000px;
    /* 开启3D效果 ？？*/
    /* transform-style: preserve-3d; */
}

.container {
    width: 400px;
    height: 100px;
    /* background-color: var(--border-color); */
    display: flex;
    justify-content: space-around;
    align-items: center;
    perspective: 1000px;
    transform-style: preserve-3d;
    transform: rotateX(45deg);
}

.fence {
    position: relative;
    width: 10px;
    height: 100%;
    border-radius: 10px;
    animation: animate 1s ease-in-out infinite alternate both;
}

.fence::before {
    /* 原视频没有，后增加发光效果 */
    content: '';
    width: 100%;
    height: 100%;
    position: absolute;
    background-color: inherit;
    filter: blur(5px);
    opacity: 0.5;
}

.fence:nth-child(1) {
    background-color: var(--color1);
    animation-delay: 0s;
}

.fence:nth-child(2) {
    background-color: var(--color2);
    animation-delay: 0.2s;
}

.fence:nth-child(3) {
    background-color: var(--color3);
    animation-delay: 0.4s;
}

.fence:nth-child(4) {
    background-color: var(--color4);
    animation-delay: 0.6s;
}

.fence:nth-child(5) {
    background-color: var(--color5);
    animation-delay: 0.8s;
}

.fence:nth-child(6) {
    background-color: var(--color6);
    animation-delay: 1s;
}

.fence:nth-child(7) {
    background-color: var(--color7);
    animation-delay: 1.2s;
}

.fence:nth-child(8) {
    background-color: var(--color8);
    animation-delay: 1.4s;
}

.fence:nth-child(9) {
    background-color: var(--color1);
    animation-delay: 1.6s;
}

.fence:nth-child(10) {
    background-color: var(--color2);
    animation-delay: 1.8s;
}

.fence:nth-child(11) {
    background-color: var(--color3);
    animation-delay: 2.0s;
}

.fence:nth-child(12) {
    background-color: var(--color4);
    animation-delay: 2.2s;
}

.fence:nth-child(13) {
    background-color: var(--color5);
    animation-delay: 2.4s;
}

.fence:nth-child(14) {
    background-color: var(--color6);
    animation-delay: 2.6s;
}

.fence:nth-child(15) {
    background-color: var(--color7);
    animation-delay: 2.8s;
}

.fence:nth-child(16) {
    background-color: var(--color8);
    animation-delay: 3s;
}

@keyframes animate {
    0% {
        transform: translateZ(-30px);
    }
    100% {
        transform: translateZ(30px);
    }
}